Yb:YAG
Ytterbium - Doped : Yttrium Aluminium Garnet Laser Crystals
Yb:YAG shows great promise as a high power laser material. Several applications are being developed in the field of industrial lasers, such as metal cutting and welding. With high quality Yb:YAG now available, additional fields and applications are being explored.
Yb:YAG's advantage is a wide pump band and an excellent emission cross section. It is ideal for diode pumping. The broad absorption band enables Yb:YAG to maintain uninterrupted pump efficiency across the typical thermal shift of diode output. High efficiency means a relatively small dimension Yb:YAG laser crystal will produce high power output. Based on the YAG host crystal, Yb:YAG can be quickly integrated into the laser design process. This combination of properties enables straightforward elegant laser designs, and allows high powered lasers to be manufactured more easily ; Yb:YAG. Laser designers can apply their depth of experience.
We offer excellent quality Yb:YAG laser crystals as both rods and discs that meet your exact specifications. Our experienced staff, can work with you to bring out the superior performance of your high power 1 micron output laser system.
Applications
- With a wide pump band and excellent emission cross-section Yb:YAG is an ideal crystal for diode pumping.
- High Output Power 1.029 1mm
- Laser Material for Diode Pumping
- Materials Processing, Welding and Cutting
Optical and Laser Properties
| Laser Action | 3 Level Laser | Emission Cross-section | Σ = 2.1 x 10-20 cm2 (± 10%) |
| Emission Lifetime | 951 µsec | Refractive Index | 1.8 at 632 nm |
| Absorption Bands | 930 nm to 945 nm | Chemical Formula | Y3Al5O12:Yb (0.1% to 15% Yb) |
| Output Wavelength | 1.029 µm |
Yb:YAG Laser Rod Standard Fabrication Specifications
| Feature | Standard | Special Order |
| Crystal Orientation | <111> within 5° | Available |
| Diameter | 3 mm to 10mm | Available |
| Daimeter Tolerance | +0.0 mm/- 0.05 mm | Available |
| Length (plano/plano) | 30 mm to 150 mm | Available |
| Length Tolerance | ± 0.75 mm | ± 0.50 mm |
| Perpendiculairity of End Faces (plano/plano) | 5 arc-minutes | 2 arc-minutes |
| Parallelism of End Faces (plano/plano) | 10 arc-seconds | |
| Flatness | 0.1 wave maximum | 0.10 wave maximum |
| (plano/plano) | over 90% of aperture | over full aperture |
| Surface Finish at 5X | 20-10 (scratch & dig) | 10-5 (scratch & dig) |
| Barrel Finish | 400 grit | Polished approx. 80-50 |
| End Face Bevel | 0.075 mm to 0.12 mm at 45° angle | |
| Chips | No chips allowed on end face of rod; chip having maximum length of 0.3 mm permitted to lie in the area of bevel and barrel surfaces. | |
| End Configurations | plano/plano, plano/wedge, wedge/wedge or Brewster cut. Plano ends can be finished flat, concave or convex | |
| Coatings | Standard coating is AR at 1.029 µm with R<0.25% each face. Other coatings available. | |